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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
 9 Months Ended
Sep. 24, 2016
USD ($)
Segment
Dec. 26, 2015
USD ($)
Sep. 26, 2015
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Number of operating segments | Segment 2    
Accounts payable and accrued expenses and other current liabilities not yet presented for payment $ 18 $ 32  
Cash and cash equivalents 801 $ 860 $ 817
Cash and cash equivalents, discontinued operations 142   $ 141
Non-US      
Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents 50    
Cash and cash equivalents, discontinued operations $ 142